| Acronym | Definition |
|---|
| MJA➣Medical Journal of Australia |
| MJA➣Methanococcus Jannaschii |
| MJA➣Maatschappelijke Jongeren Actie (Dutch: Social Youth Action; Brussels, Belgium) |
| MJA➣Master of Justice Administration (Methodist University and Norwich University) |
| MJA➣Marsden Jacob Associates (Australia) |
| MJA➣Modern Jesus Army |
| MJA➣Microjet Array |